Communications: directive radio wave systems and devices (e.g. – Directive – Including a satellite
Patent
1998-02-19
2000-12-26
Issing, Gregory C.
Communications: directive radio wave systems and devices (e.g.,
Directive
Including a satellite
34235711, G01S 502
Patent
active
061666831
ABSTRACT:
A system and method of detecting and correcting for cycle slip in a GPS attitude determination system is presented. The method employs several techniques for detecting and correcting for faults in high integrity carrier phase-related applications. A delta single difference is used as a primary measurement residual in detecting cycle slip. The delta single difference represents the difference in phase of a carrier signal of a GPS satellite at two receiving antennas over two points in time. This delta single difference is compared to a detection failure threshold computed based on certain high integrity needs. Satellites showing a failure are excluded. In addition, satellites that fail a detectability test, indicating the inability to detect a fault, are pre-excluded from attitude solution computation. When re-resolving integer ambiguities associated with fault detection and correction, the method ensures that the integer ambiguity is resolvable via a resolvability algorithm before implementing a solution-based integer ambiguity resolution.
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Eppele Kyle
Issing Gregory C.
O'Shaughnessy James P.
Rockwell International Corporation
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